South Twin (Peak) (3,566 m (11,699 ft)) is one of two main peaks that comprise The Twins massif located at the northeast corner of the Columbia Icefield in Jasper National Park, Alberta, Canada.

The other higher main peak is named North Twin, with a height of 3,731 m (12,241 ft).

South Twin is the eighth-highest peak in the Canadian Rockies.

The massif was named The Twins in 1898 by J. Norman Collie and Hugh M. Stutfield.

[1] The normal route is a ski mountaineering climb on the eastern slopes of North Twin, and then a traverse to the South Twin, although an ice axe is recommended for the narrow connecting ridge as well as the summit ridge.